a {
    color: #fff;
  }

h1 {
    color: #fff;
}

p {
    color: #fff;
}

body {
    background-color: #749cdb;
    color: #fff;
}

.btn-tbl-header {
    width: 100%;
    height: 100%;
}

canvas {
    border-style:dotted;
    border-width: 3px;
    border-color: #fff;
    background-color:#b2c2db;
    padding: 0;
    margin: auto;
    display: block;
    width: 800px;
    height: 600px;
    position: absolute;
    top: 0;
    bottom: 0;
    left: 0;
    right: 0;
}